I use Android and having Android Auto is absolutely a must have for me.

AUX cord? It's been a few years since I've seen a phone with a headphone jack, or a car with an AUX input. I also don't miss the time where my phone had to be connected on one side to USB for charging, on the other side to the sounds system, and my navigation was done using a a 6" screen that kept falling between the chairs. Android Auto/CarPlay let's you connect one thing (or not at all), have your phone charged, your navigation clear, and your music playing smoothly and controlled with the physical car knobs.